Author RazerM
Recipients RazerM, paul.moore, steve.dower, tim.golden, zach.ware
Date 2017-01-30.17:30:26
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On 3.5.2 and 3.5.3, but not 3.4.3 or 2.7.10 (Windows 64-bit), the third line causes Python to crash with exit code 0xC0000417.

import msvcrt
fp = open('file.txt', 'w')
msvcrt.locking(fp.fileno(), msvcrt.LK_NBLCK, -1)

I came across this in the portalocker module. I don't think -1 is a valid third argument, but it doesn't raise an exception on Python 3.4 or 2.7.
Date User Action Args
2017-01-30 17:30:26RazerMsetrecipients: + RazerM, paul.moore, tim.golden, zach.ware, steve.dower
2017-01-30 17:30:26RazerMsetmessageid: <>
2017-01-30 17:30:26RazerMlinkissue29392 messages
2017-01-30 17:30:26RazerMcreate